use db (databendlabs#12104)

docs/doc/13-sql-reference/41-access-control-privileges.md

@@ -81,13 +81,14 @@ Databend offers a range of privileges that allow you to exercise fine-grained co
 
 ## Database Privileges
 
+Please note that you can use the [USE DATABASE](../14-sql-commands/00-ddl/10-database/ddl-use-database.md) command to specify a database once you have any of the following privileges to the database or any privilege to a table in the database.
+
 | Privilege | Description |
 |:----------|:--------------------------------------------------------------------------------|
 | Alter | Renames a database. |
 | CREATE | Creates a database. |
 | DROP | Drops or undrops a database. Restores the recent version of a dropped database. |
-| SELECT | SHOW CREATE a database. USE a database. |
-
+| SELECT | SHOW CREATE a database. |
 
 ## Session Policy Privileges
 

docs/doc/14-sql-commands/00-ddl/10-database/ddl-use-database.md

@@ -0,0 +1,51 @@
+---
+title: USE DATABASE
+---
+
+Selects a database for the current session. This statement allows you to specify and switch to a different database. Once you set the current database using this command, it remains the same until the end of the session unless you choose to change it.
+
+## Syntax
+
+```sql
+USE <database_name>
+```
+
+## Examples
+
+```sql
+-- Create two databases
+CREATE DATABASE database1;
+CREATE DATABASE database2;
+
+-- Select and use "database1" as the current database
+USE database1;
+
+-- Create a new table "table1" in "database1"
+CREATE TABLE table1 (
+ id INT,
+ name VARCHAR(50)
+);
+
+-- Insert data into "table1"
+INSERT INTO table1 (id, name) VALUES (1, 'John');
+INSERT INTO table1 (id, name) VALUES (2, 'Alice');
+
+-- Query all data from "table1"
+SELECT * FROM table1;
+
+-- Switch to "database2" as the current database
+USE database2;
+
+-- Create a new table "table2" in "database2"
+CREATE TABLE table2 (
+ id INT,
+ city VARCHAR(50)
+);
+
+-- Insert data into "table2"
+INSERT INTO table2 (id, city) VALUES (1, 'New York');
+INSERT INTO table2 (id, city) VALUES (2, 'London');
+
+-- Query all data from "table2"
+SELECT * FROM table2;
+```